2 yr old Billies medical fund

My niece Billie-Grace was diagnosed with Kawasaki desease over a year ago, only recently she made her first trip to Melbourne from Tasmania to get a much needed heart scan, to determine if she would need heart surgery, unfortunately the hospital did not inform her family (my sister) that they would need extra time after the 4 hour scan before they could fly again. My sister and her partner spent all the money that family and friends had raised to get over to melbourne , only to find out they would have to do it all again, as they had no excess money to buy more plane tickets and accommodation. I am asking anyone who can help out in getting Billie back to Melbourne to get her scan. As it is almost Christmas I don't want little Billie having to miss out on Christmas presants because all of the money spent having to fly back to Melbourne. Thank you all in advance, x